Horseshoe-calk



UNITED STATES PATEN Fries.

GEORGE \V. EMPLE, OF BOSTON, MASSACHUSETTS.

HORSESHOES-CALK.

SPECIFICATION forming part of Letters Patent No. 465,620, dated December 22, 1891.

Application filed J'anuary15,1891. Serial No. 377,830. (N0 model.)

To all whom it may concern.-

Beit known that I, GEORGE W. WEMPLE, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Horseshoe Calks, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to the construct-ion of horseshoe-calks and to that class of such calks as are removably attached to the shoe, and is an improvement upon the invention described in the Letters Patent No. 396,521, granted to me January 22, 1889; and it consists in certain novel features of construction, arrangement, and combination of parts and in the process of making the same, which will be readily understood by reference to the description of the drawings, and to the claims hereinafter given, and in which my invention is clearly pointed out.

Figure 1 of the drawings is aside elevation of atoe-calk embodying my invention in condition to be applied to the shoe. Fig. 2 is a transverse section of the same on line 1 1 on Fig. 1. Fig. 3 is a similar section illustrating a modification in the form of the calk, and in the manner of applying thereto the shanks for attaching the calk to the shoe. Figs. 4 and 5 are a side elevation and transverse section of the steel portion of the calk fitted to receive a soft-iron cap or head-piece. Figs. 6 and 7 are respectively a plan and transverse section of the soft-iron cap orhead. Figs. 8 and 9 are respectively a plan and an elevation of one of the shanks to serve as a means of securing the calk to the shoe. Figs. 10 and 11 are transverse sectional elevations of the assembled parts before being welded together, and Figs. 12 and 13 are respectively an end view and an elevation of a modified form of one of the shanks.

I have found by practical experiment that it is very difficult, not to say impossible, to properly temper a calk the body and shanks of which are made integral from steel without so far affecting the shanks as to render them brittle and liable to break when being driven into the oblique holes in the shoe, as described in my before-cited prior patent. To obviate this difficulty, I now make the main body of the calk of steel and the shanks of softiron,weld them together, and then drop the whole, while at a proper tempering-heat, into a suitable tempering-liquid, when the calk becomes hardened, while the shanks remain soft and tough. In some cases I accomplish this by having bars of steel rolled to the desired cross-section for the calk, whether it be a sharpened calk for winter use or a blunt calk for summer wear; out sections of the desired length from said bar; drill two or more holes in the upper face of said section; cut short sections from a round rod of soft iron; form on one end of each a short reduced stem, as shown in Figs. 12 and 13; insert said stems in the holes in the calk; heat the assembled parts to a welding heat; subject them to a heavy pressure in any well-known manner, to weld the parts firmly together, and then drop the article into the tempering-bath, thus producing the article shown in section in Fig. 3, in which A is the steel portion and a the softiron shanks, extending into the steel body, as indicated by the section-lines. Generally, however, I prefer to make the calks in the following manner. I have steel bars rolled to a cross-section, as shown in full or in dotted lines in Fig. 5, according, as I wish a sharp or blunt calk, and soft-iron bars rolled to an E-shaped cross-section, as shown in Fig. 7 cut from said bars sections A and B, respectively, of the desired length; punch the holes I) h in the section B, as shown in Fig. 6. The shanks a are made with thin flat heads a, and are inserted in the holes Z) I) in the cap-bar B with their heads between the ribs 0 c of said cap, and the steel section A is placed with its upper portion between said ribs and in contact with the heads of the shanks, as shown in Fig. 10, and pressure is applied to the sides of the ribs 0 o to press them in upon the steel bar A while in a cold state, as shown in Fig. 11, and the assembled parts are then heated to a proper welding heat, and the whole is subjected to a heavy pressure in suitable dies to firmly weld the several parts together and swage them to the desired shape, giving a slight taper to the projecting portions of the shanks, as shown in Figs. 1 and 2, when the welded article is dropped into a suitable tempering-bath, to harden the steel without additional heating.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. A horseshoe-calk provided with a plurality of shanks to enter holes in the body of the shoe for securing said ealk thereto, the main body of which is composed of a hardenedsteel Wearing portion and a soft-iron back or upper portion, and the shanks made of soft iron and inserted through holes in said softiron back and the whole welded together, substantially as described.

2. In removable horseshoe-calks, the combination of the mainbody of the oalk, composed of the hardened-steel wearing portion A and the soft-iron cap B, provided with the ribs 0 c and the holes I) Z), and the shanks a a, provided with flat heads a, the parts being assembled togetherand firmly welded together, substantially as described.

3. Adetachable horseshoe-calk comprising the tread or wearing portion A, having its upper portion made dovetailing in cross-section and made of steel, the soft-iron cap or upper portion B, provided with the lips c c and holes I), and the soft-iron shanks a, provided with the heads a, said shanks being inserted through the holes I) in the cap B with their heads between the ribs 0 c, and the dovetailed edge of the tread portionA being inserted between the ribs 0 c and in contact with the heads a, and the whole compacted by applying pressure thereto while in a cold state and welded firmly together, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 14th day of January, A. D. 1891.

GEORGE W. WVEMPLE. Witnesses:

N. O. LOMBARD, WALTER E. LOMBARD. 

